D-And F-Block Elements Ques 245
Question: $ KMnO_4 $ reacts with ferrous sulphate according to the equation $ MnO_4^{-}+5F{{e}^{2+}}+8{{H}^{+}}\to M{{n}^{2+}}+5F{{e}^{3+}}+4H_2O $ Here $ 10ml $ of $ 0.1M $ $ KMnO_4 $ is equivalent to
[CPMT 1999]
Options:
A) $ 20ml $ of $ 0.1M $ $ FeSO_4 $
B) $ 30ml $ of $ 0.1M $ $ FeSO_4 $
C) $ 40ml $ of $ 0.1M $ $ FeSO_4 $
D) $ 50ml $ of $ 0.1M $ $ FeSO_4 $
Show Answer
Answer:
Correct Answer: D
Solution:
In this reaction $ \underset{1}{\mathop{MnO_4^{-}}},+\underset{5}{\mathop{5F{{e}^{2+}}}},+8{{H}^{+}}\to M{{n}^{2+}}+5F{{e}^{3+}}+4H_2O $ 5 time quantity of $ F{{e}^{2+}} $ consumed. So 5 time of $ FeSO_4 $ will be equivalent to 50 ml
